The compound diborane can be used as a rocket propellant. What is the percent composition of boron in diborane (B2H6) ? A. 22% B. 25% C. 39% D. 75% E. 78%

What causes the wet bulb temperature and the dry bulb temperatures to be different?

The volume of a given quantity of a gas must increase if: A the temperature and pressure increase B the temperature and pressure decrease C the temperature increases and the pressure decreases D the temperature decreases and the pressure increases

A redox reaction employed in an electrochemical cell has a negative. Which statement is true? a) E∘cell is positive b) K>1 E∘cell is positive c) K<1 E∘cell is negative d) K1

A hypothetical pure element consists entirely of two isotopes. the natural percent abundance of the isotope with mass 25.2 u is 80.1%. the other isotope has mass 29.4 u. calculate the atomic weight of the naturally occurring element

Name the haloalkane that has 7 carbons in a chain, a chlorine on the second carbon, and a bromine on the third carbon.

You need to make an aqueous solution of 0.223 M barium bromide for an experiment in the lab, using a 250 mL volumetric flask. How much solid barium bromide should you add?

What is wosutah unsrcambled

How many moles of al2o3 are formed when 0.78 mol o2 reacts with aluminum?

The dissociation of a weak electrolyte is suppressed when

There are seven major levels of classification. Kingdom and Phylum are just two of the levels. Which of the following are also major levels of classification? Choose all answers that are correct. A. Class B. Order C. Family D. Level